Devils Guard by George Robert Elford

Quite a controversial book in which it is claimed by the author that the story was told to him first hand by former Waffen SS Partizan Jaeger Kommando Captain Hans Wagemuller. The story goes that Wagemuller led his men out of the Eastern front fighting partisans back to Germany/Switzerland where he and eventually around 900 former SS soldiers were enlisted into a Nazi Battalion as part of the French Foreign Legion and sent to Vietnam to fight against the Vietnam Minh.
They are alleged to have ferocious and brutal tactics which made the French and the locals afraid of them.
The story is full of neo-Nazi propaganda and appears a work of fiction.
Wagemuller is reported to have been still alive in 1980 but disappeared off the radar subsequently.

It as in the top 10 book list of US servicemen in the First Gulf War and the only military book in that list.

It’s an interesting and thought provoking read